<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>聊天室登录页面</title>
    <style>
        body {
            width: 100%;
            height: 600px;
            background-image: url(img/222.jpg);
            background-repeat: no-repeat;
            background-size: cover;
            }

        .div {
            width: 400px;
            height: 500px;
            /* 实现整个框居中效果 */
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            overflow: hidden;
        }

        .head-div {
            width: 100px;
            height: 100px;
            border: 1px solid #999;
            border-radius: 50%;
            margin: 0 auto 10px auto;
            background: url(img/1.jpg) no-repeat;
            background-size: 100px 100px;
        }

        .sign-div {
            width: 400px;
            height: 300px;
            text-align: center;
            outline: none;
            border: 1px solid rgb(94, 92, 233);
            border-radius: 8px;
            background-color: rgba(172, 235, 243, .2);
            box-sizing: border-box;
        }

        .sign-div h1 {
            margin-bottom: 10px;
            color: rgb(29, 26, 26);
        }

        input {
            width: 250px;
            height: 44px;
            border: none;
            /* 元素周围的轮廓无效 */
            outline: none;
            /* 为元素指定的任何内边距和边框都将在已设定的宽度和高度内进行绘制 */
            box-sizing: border-box;
            display: block;
            padding: 0 16px;
        }

        .input-text {
            margin: 5px auto;
            border-radius: 16px;
        }

        .input-text:hover {
            border: 0.5px solid rgb(76, 76, 233);
            transition: 0.5s;
            border-radius: 4px;
        }

        .input-btn {
            margin: 30px auto 20px;
            border-radius: 44px;
            cursor: pointer;
            background-color: rgba(84, 175, 249, 0.8);
        }

        .input-btn:hover {
            color: #fff;
            font-size: 16;
            border-radius: 4px;
            transition: 0.5s;
            background-color: rgba(10, 138, 243, 0.8);
        }

        .sign-div a {
            text-decoration: none;
            color: rgb(92, 61, 112);
            font-size: 14px;
            padding: 10px;
            transition: 0.8s;
            display: block;
        }

        a:hover {
            color: #FFF;
            background: rgba(0, 0, 0, .3);
            border-radius: 8px;
        }
    </style>
</head>

<body>
    <div class="div">
        <div class="head-div"></div>
        <div class="sign-div">
            <form class="" action="#" method="POST">
                <h1>登录</h1>
                <input class="input-text" type="text" name="username" placeholder="帐号">
                <input class="input-text" type="password" name="password" placeholder="密码">
                <input class="input-btn" type="submit" value="登录" onclick="login_click()">
                <a href="#">忘记密码?</a>
            </form>
        </div>
    </div>
</body>
</html>